title: Photoionization of small sodium-doped acetic acid clusters.
abstract: The uptake of sodium and the fragmentation before and after "soft" photoionization with ultraviolet light are investigated for small acetic acid clusters. The acetic acid clusters are generated in a supersonic expansion and ionized with ultraviolet light after doping with sodium in a pick-up chamber. The composition of the bare acetic acid clusters in the molecular beam is determined independently from complementary photoionization experiments using extreme ultraviolet light. The experimental results are analyzed with the help of density functional calculations for energetics and statistical adiabatic channel calculations for fragmentation kinetics. The study demonstrates that the detected ions originate from fragmentation in the neutral as well as in the ionic state, and in particular that the fragmentation pathway strongly depends on the cluster size.
authors.affiliation: Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: Piotr W
authors.initials: PW
authors.lastname: Forysinski
authors.forename: Philipp
authors.initials: P
authors.lastname: Zielke
authors.forename: David
authors.initials: D
authors.lastname: Luckhaus
authors.forename: Jennifer
authors.initials: J
authors.lastname: Corbett
authors.forename: Ruth
authors.initials: R
authors.lastname: Signorell
mesh_terms: D000085:Acetates / Q000737:chemistry*; D055668:Photochemical Processes; D011789:Quantum Theory; D012964:Sodium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D000085:Acetates; D012964:Sodium